Clamp.



i J`1'.,\J'rrnnA STATES .l

Animar cARLsoN, or calorico, ILitINoIs;

CLAMP.

j, ...11., fr) 'SECIFICATION formngpart of Letters Patent No. 655,193, dated August 7, 1906.

Application'led April 14,1900.

Be it known that I, ALERT CARLSON, a citi zen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Clamp, of which the following is a specification.

This invention relates to clamps; and the object of the same is to provide a simple device of this character for the use of cabinetmakers and others for holding together pieces of wood which have been glued pending the settlement and hardening of the glue or for other purposes and to have an operation of the clamping-jaws in a positive manner without notching or serrating the supporting-bar or employing binding-screws having direct contact with a portion of the joint held, the improved structure being light and stron g and durable.

The invention consists in the construction and arrangement of theV several parts, which will be more fully hereinafter described and claimed.

In the drawings, Figure 1 is a perspective view of a clamp embodying the features of the invention. Fig. 2-is a sectional elevation of the improved clamp.

Similar numerals of reference are employed to indicate corresponding parts in the views.

The numeral 1 designates the supportingbar, which in the present instance is of rectangular form and of reduced thickness, and thereon is a freely-movable jaw 2, which has an opening 3 therethrough of slightly-larger dimensions than the bar 1 and arranged at an oblique angle to the engaging face of the said jaw to thereby cause diagonally-opposite corners to bite upon the opposite edges of the bar during the clamping operation and do away with the usual provision of serrations, common notches, or other holding structures and considerably cheapen the manufacture of clamps of this character and at the same time obtain equally as good service. The jaw 2 is prevented from riding or slipping off the bar l by atransversely-extending stop rivet or stud 4, and the range of movement of the jaw on the bar 1 will be between the said rivet- 4 and another stop-rivet 5 adjacent the opposite extremity of the bar 1, which con- 1in es a pressure-jaw to a limited movement Serial No. 12,892. (No modali? on the bar. The extremity or terminal of the bar l adjacent the location ofthe jaw 6 is reduced, as at 7, andthereon a sleeve Sis slipped and held against accidental disconnection by a transverse pin or analogous device 9. The exterior surface of the said sleeve S from end to end is screw-threaded and the front eX- tremity thereof is held against the recess por- `tions 10, provided in forming the reduced eX- tremity or terminal 7, to thus'brace the said sleeve and overcome any tendency thereof to move forward and also aiford means for providing a flush fitting within the contines or extent of the thickness of the bar. On the screw threaded sleeve 8 a screwthreaded clamping-cap 1l is adjustably mounted and operated by a hand or gripping bar 12, extending through the outer reduced extremity 13 thereof and supplied with opposite terminal balls 14 for obvious reasons. The screwthreaded cavity of the clamping-cap 1l is long enough to permit the same to be run over the sleeve 8 and have the inner terminal contact with the adjacent end of the pressure-jaw 6, and the operation of clamping a joint or other closely-arranged parts by means of the improved clamp will be as follows: The jaw 2 is moved longitudinally over the bar 1 and brought to bear against one side of the joint or other closely-arranged parts, with the pressure-jaw` 6 on the opposite side and which will be shoved back or outward in contact with the inner terminal of the clamping-cap 1l. By turning the said cap 11 it will be fed over the screw-sleeve 8 and force the pressure-jaw 6 closely against the joint or parts to'be held, and at the same time the jaw 2 will be tilted in an outward direction, as shown in Fig. 2, to cause the inner and outer diagonally-opposite edges to bite on the bar with suiicient firmness to prevent slipping of the jaw 2. A firm clamping pressure can thus be applied, which will remain constant or until the pressure-jaw 6 is released, and it will be observed that the provision of the screw-sleeve 8, applied in the manner set forth, permits the use of a rectangular bar 1 with material advantage in the operation of thejaw 2 and that the direct Contact of screw ends with the work or parts clamped is entirely avoided.

ed clamping-cap adj ustably mounted on the said sleeve to have contact With the pressurejaw, the latter jaw having limited movement.

2. A clamp comprising a supporting-bar with a freely-slidable jaw thereon provided with an angularly-directed opening therethrough larger than the dimensions of the bar,

a pressurejaw having limited movement on the baradjacent one extremity of the latter,v

the extremity of the bar adjacent the pressure-jaw being reduced, an exteriorly-screwthreaded sleeve mounted on the reduced eX- tremity of the supporting-bar, a screw-threaded clamping-cap adjustably positioned on the screw threaded sleeve to contact with the outer end of the pressure-jaw, and means for vpreventing the freely-slidable jaw from slipping o the bar and of limiting the movement VofV the pressure-jaw.

A In testimony that I claim the foregoing as my own I have hereto afxed my signature in the presence of two Witnesses.

ALBERT CARLSON. Witnesses:

Geer NELSON, C, EKsTRoM. l 

